#ifndef _HEADER_TOKEN_H_INCLUDED_
#define _HEADER_TOKEN_H_INCLUDED_

/*++
 * NAME
 *	header_token 3h
 * SUMMARY
 *	mail header parser
 * SYNOPSIS
 *	#include "header_token.h"
 * DESCRIPTION
 * .nf
 */

 /*
  * Utility library.
  */
#include <stdlib.h>
#include "stdlib/acl_vstring.h"

 /*
  * HEADER header parser tokens. Specials and controls are represented by
  * themselves. Character pointers point to substrings in a token buffer.
  */
typedef struct HEADER_TOKEN {
	int type;               /* see below */
	union {
		const char *value;  /* just a pointer, not a copy */
		ssize_t offset;     /* index into token buffer */
	} u;                    /* indent beats any alternative */
} HEADER_TOKEN;

#define HEADER_TOK_TOKEN	256
#define HEADER_TOK_QSTRING	257

extern ssize_t header_token(HEADER_TOKEN *, ssize_t, ACL_VSTRING *, const char **, const char *, int);

/* LICENSE
 * .ad
 * .fi
 *	The Secure Mailer license must be distributed with this software.
 * AUTHOR(S)
 *	Wietse Venema
 *	IBM T.J. Watson Research
 *	P.O. Box 704
 *	Yorktown Heights, NY 10598, USA
 *--*/

#endif
